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¸Çï³ñÏ»Ýù ³ÛÅÙ í»Ïïáñ³Ï³Ý Ù»Ãá¹Ç ÏÇñ³éÙ³Ý ûñÇݳÏÝ»ñ£ ²é³ÝÓ-<br />
ݳóÝ»Ýù ³Û¹ Ù»Ãá¹Ç »ñÏáõ ï³ñ³ï»ë³ÏÝ»ñ£<br />
ì»Ïïáñ³Ï³Ý Ù»Ãá¹Ç ³é³çÇÝ ï³ñ³ï»ë³ÏÁ£<br />
²Ûëï»Õ û·ï³·áñÍíáõÙ »Ý í»ÏïáñÝ»ñÇ Ñ³Ù³·ÇÍ ÉÇÝ»Éáõ å³ÛÙ³ÝÁ, ѳñ-<br />
ÃáõÃÛ³Ý (ï³ñ³ÍáõÃÛ³Ý) ó³Ýϳó³Í í»ÏïáñÁ »ñÏáõ áã ѳٳ·ÇÍ (»ñ»ù ï³ñ³Ñ³ñÃ)<br />
í»ÏïáñÝ»ñáí Ý»ñϳ۳óÙ³Ý ÙdzÏáõÃÛáõÝÁ£<br />
ÈáõÍ»Ýù, ûñÇݳÏ, Ñ»ï¨Û³É ËݹÇñÁ£<br />
ÊݹÇñ 3£ ¸Çï³ñÏ»Ýù ABCDE ÑÝ·³ÝÏÛáõÝÁ£ M, K, N ¨ L Ï»ï»ñÁ ѳٳå³ï³ë˳ݳμ³ñ<br />
BC, CD, DE ¨ EA ÏáÕÙ»ñÇ ÙÇçݳϻï»ñÝ »Ý£ ²å³óáõó»ù,<br />
áñ MN ¨ KL ѳïí³ÍÝ»ñÇ ÙÇçݳϻï»ñÁ ÙdzóÝáÕ Ñ³ïí³ÍÁ ½áõ·³Ñ»é ¿<br />
1<br />
AB-ÇÝ ¨ ѳí³ë³ñ ¿ −− AB£<br />
4<br />
ÈáõÍáõÙ£ Üϳï»Ýù, áñ ѳñÃáõÃÛ³Ý ó³Ýϳó³Í O, P ¨ Q Ï»ï»ñÇ Ñ³Ù³ñ<br />
ï»ÕÇ áõÝÇ<br />
1<br />
!O#T =−−(!O#P+ !O#Q)<br />
2<br />
ѳí³ë³ñáõÃÛáõÝÁ, áñï»Õ T-Ý PQ ѳïí³ÍÇ ÙÇçݳϻïÝ ¿ (ÝÏ. 45)£<br />
²Ûëï»ÕÇó ÏáõݻݳÝùª (ÝÏ. 46)<br />
1 1<br />
!A#M = −−(!A#B + !A#C), !A#K = −−(!A#C + !A#D)<br />
2 2<br />
1 1<br />
!A#N = −−(!A#D + !A#E), !A#L = −−!A#E<br />
2 2<br />
ºÃ» F-Á ¨ G-Ý MN ¨ KL ѳïí³ÍÝ»ñÇ ÙÇçݳϻï»ñÝ »Ý, ³å³<br />
1 1 1<br />
!A#F = −−(!A#M + !A#N) = −−(!A#B + !A#C + !A#D + !D#E), !A#G = −−(!A#C + !A#D + !A#E):<br />
2 4 4<br />
²ÛëåÇëáí,<br />
1<br />
!G#F = !A#F − !A#G = −−!A#B: ∇<br />
4<br />
ÜÏ. 45 ÜÏ. 46<br />
73
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